Karl Emil Ferdinand Ignatius (27 September 1837 – 11 September 1909) was a Finnish historian, the head of the Main Office of Statistics and a Senator.

He graduated secondary school in 1855 and enrolled in the Imperial Alexander University in Helsinki, gaining his undergraduate and graduate degrees in 1860, a Licenciate degree in 1862 and finally his Ph.D in 1864.

He was the head of the chamber committee of the Senate of Finland during 1885–1900 and 1905–1908.

Ignatius worked also as a Docent of Nordic History and Statistics from 1865 to 1870 and as the Curator of the Western Finland's Student Nation (combination of Turkulainen and Satakuntalainen Osakunta during 1846–1904)[5] from 1868 to 1870.

[1] Ignatius took part in the Diet of Finland as a member of the burghers estate in 1877–1885 and 1904–1905.